VolumeVIII-Winter2018|73Co-simulation-BreakingtheBackofMultiphysicsCAESimulationByDr.
KeithHanna,VicePresidentMarketing,MSCSoftwareOverthelast20yearsorso,oneofthe'holygrails'ofcomputer-aidedengineering(CAE)hasbeen'multiphysics'simulations,i.
e.
co-simulationsbetweendifferentphysicssimulationtypes(Ref.
1).
Multiphysics,eventhoughanill-definedterm,kindoffeelsintuitivelyrighttousengineersfromtheperspectiveofreal-worldengineeringsimulation.
Fluidsdon'tusuallyexistinisolationfromstructuraleffects,oracoustics,ordynamicsintherealworldweinhabit,yetformanyyearspast,engineershavesimulatedthesesubdomainsofphysicsasisolatedpointsimulationsolutionsinCAE.
IhavetoaddariderherethatmyPhysicsteacheratHighSchool,MrCopeland,wouldhavetakenmetotaskforusingtheword'multiphysics'atallbecausestrictlyitiswrong.
Thereisactuallyonlyonedisciplineofphysics,asthereisforchemistryandbiology.
WithinphysicstherearesubdisciplineslikeNewtownianLawsofMotion(andfluids),Maxwell'sLawsofAdams-scFLOWpredictionofdynamicvehiclesuspensionmovementinacrossflowwind74|EngineeringRealityMagazineElectromagnetics,StructuralStress-Strainlawsetc.
This'multiphysics'wordthatwascoinedinthe1990sisactuallyaconsequenceofafailureoftheCAEindustrytosolvethefundamentalunderlyingphysicsequationsinacombinedwayinmyopinion.
Partly,thisisduetopracticalproblemsthatwefindbecauseofdifferentmathematicaltechniques.
Forinstance,FiniteVolumeMethods(bestforfluids),FiniteElementMethods(bestforstructuresandacoustics)meanthatformoreefficientsolverconvergenceinrealworldengineeringproblems,oneortheotherischosenasthebestmethodology.
Andpartly,softwarevendorshavestruggledtograpplewiththemultiphysicschallengetodeliverusableengineeringsimulationtoolsbecausethemathematicalapproachesdon'ttendtogelwelltogetherwhencombined.
Figure1:MSC'sUniqueMultiphysicsCo-SimulationCapabilitiesTable1:ACrossSectionofCo-SimulationCAEapplicationsconnectedtotheMSCSoftwareSolutionSuiteVolumeVIII-Winter2018|75WhatwasverystrikingaboutMSCSoftwarewhenIjoinedearlierthisyear,apartfromits50+yearhistorystretchingbacktotheearlyNASAmoonlandingproject,andthedesireforaccuracyinsoftwaresolutions,isalargelyunderstatedhistoryofendeavoringtoprovideworldclassCAEco-simulationsolutionstoitscustomersaswellasengineerseverywhere.
Everythingfromacousticstomultibodydynamics(MBD),toCFD,tostructuralanalysis,andexplicitcrashdynamicscanbeconnectedtogetherinMSC(seeFigure1).
Ihavegatheredtogetheramultiplicityofmultiphysicsco-simulationapplicationsthatcanbedonewithMSCsoftwaretoolstoday,bothintwo-productcouplings,aswellasintoolchainsofproductsimulationsthatweremerepipedreamsafewyearsago(seeTable1).
MultiBodyDynamicsLedCo-SimulationWhenonedigsdownonesoondiscoversthatthemarketleadingAdamsMBDproductisbeingusedextensivelyforindustrialgradeco-simulationsaroundtheworldtodayasamatterofcourse,andisopentoconnectionswithallsortsofcommercialandopen-sourcesoftware(seeFigure2).
SomenotablerecentinnovationsareconnectionstothemarketleadingDiscreteElementModelingsoftware,EDEM,fromDEMSolutions,asillustratedbyFigure3,VIRESVirtualTestDrive(VTD)forADASandautonomousvehicledrivesimulation(VIREShasbeenpartofMSC/Hexagonsince2017),andofcourseMATLAB&SIMULINKfor0D/1Dsystemsandcontrolsmodeling(fromMathWorks).
AdamscoupledwithMarccansolvewiperblademovements,hydraulicFigure2:MSC'sAdamsMBDCo-SimulationCapabilityEcosystemFigure3:MSC'sAdamsMBDCo-SimulationCapabilitywithEDEMfromDEMSolutionsFigure4:MSC'sNastran–scFLOW-MarcCo-Simulationofaflapbendingandtwistinginacrossflowactuators,rubberdoorseals,andfullvehiclebushmodeling.
Iwillgointomoredetailbelowabouttheexcitingnewco-simulationmultiphysicscapabilitiesthattheCFDsoftwareacquisitionofSoftwareCradlebyMSCSoftwarein2016isnowbeginningtoopenupforCFDandCAEengineersalike.
Averycomplexandchallengingdynamicco-simulationisshowninFigure4whereanon-linearbendingandtwistingmetallicflapinacrossflowwassimulatedinanscFLOW-Marc-MSCNastrantoolchain.
AcousticsLedCo-SimulationActranisrecognizedtobethemarketleaderinacousticssimulationwithatwenty-yearhistorybehinditandabluechipuserbaseworldwide.
IthasmanymultiphysicsacousticapplicationsliketheclassiconeofcouplingwithCFDforaeroacousticanalysis.
Actranprovidestodayacompleteend-to-76|EngineeringRealityMagazineendsolutionfrommechanicalloadpredictiontonoiseandvibrationassessment.
InarecentWebinar(Ref.
2)mycolleaguesRomainBaudsonandYijunFanlookedatacousticpredictionsforelectricvehicleswithActranledtoolchains.
Figure5showsthetwotoolchainstheyemployedintheirco-simulationanalyses.
MultibodysimulationwithAdamsprovidesthestructuralloadswhentheconventionalpowertrainisoperating,thenMSCNastranwasusedforvibrationanalysis.
Finally,noiseradiationisthencomputedwithActranwithhighaccuracyinafullyautomatedprocess.
Bycomparison,forElectricVehicles,electromagneticsimulationresultsfromvariousthirdpartysoftware(forexample,JMAG,MagNet,Maxwell…)canbeintegratedwithMSC'sFEAtoolsforelectricmotornoiseprediction.
InsodoingActranprovidesaccuratenoisepredictionsforboththeelectricmotorandthegearreducer.
Finally,arelativelyrecentacousticsandfluidsco-simulationisillustratedinFigure6betweenActranandscFLOWfromSoftwareCradlewhereanautomotiveexhaustandmufflersystemwasmodeledinCFDandcoupledwithActranforacousticnoiseprediction.
CFDLedCo-SimulationComputationalFluidDynamics(CFD)haslongbeenapassionofmineanditisgenuinelyquiteexcitingtoseewhatishappeninginJapanwithSoftwareCradle'sco-simulationCFDefforts.
Theyhavedevisedaremarkablyrobustandopensoftwareplatformforco-simulation(seeFigure7).
SoftwareCradle'sCFDproducts–scFLOW(thatemployspolyhedralmeshes),scSTREAM(withCartesianmeshes)andSC/Tetra(withtetrahedralmeshes)havealonghistoryofusebylargeOEMsandleadingJapanesecompaniesandcomewithastrongtechnicalFigure5:MSC'sAdams–NastranandActranConventionalAutomotivePowertrainCo-SimulationToolchain(left)andE-Mag–Nastran–Actrane-PowertrainToolchainforAcoustics(right)Figure6:MSC'sCradleCFDandActranAcousticsco-simulationforanAutomotiveExhaustandMufflerAeroacousticsPredictionVolumeVIII-Winter2018|77pedigree.
Theyaretechnologyleadinginfreesurfaceandoversetmeshingtechniqueswithfast,accurateandrobustapproaches.
PhysicalquantitiescanbepassedbetweenthirdpartyandMSC'sCAEsoftwareandCradle'sCFDtoolsusingitsFMI(FunctionalMockupInterface).
TheFMIsupportsgeneralphysicalquantitysettings,user-definedfunctions,andscriptlanguages.
WithAdamsinparticular,thisco-simulationapproachcandolargeparticulateflowsonfreesurfaces(Figure8),vanepumps,washingmachinedrumvibration,andMBDfueltanksloshing(Figure9)forinstance.
AreallyexcitingMBDapplicationisthatofavehicledrivingthroughalargepuddlewithsuspensioneffectstakenintoaccountbyAdamsorthesamevehicle'sdynamicsinacrosswind(Figure10).
Co-simulationwithMarcmeansthatCradleCFDcouplingscandoaircraftfueltankbaffles,liquidquenching,flexibleplates/membranes/valveseals(Figure11),andSiroccofans.
WhencoupledtoMSCNastran,scFLOWcandoFSIofship'spropellerwithcavitationeffectsincludedforexample(seeFigure12).
It'sthereallycoolco-simulationCFDapplicationsthatcatchyoureyethemost,however.
SoftwareCradlehavecoupledAdamswithscFLOWtolookatdynamicaircraftwingandflapdeploymentaerodynamicFigure7:SoftwareCradle'sOpenCouplingCFDPlatform(Left)andFMIInterfaces(Right)Figure8:Adams–scSTREAMpredictionoflargelogsinachannelfreesurfaceflowFigure9:Adams-scFLOWpredictionofdynamicsloshingofliquidinatankFigure10:Adams–scSTREAMpredictionofadynamicvehiclesuspensionmovementthroughapuddleFigure11:FSIanalysisusingMarcandscFLOWofaValvewithanElasticMembranedeformedbyflowFigure12:MSCNastran-scFLOWpredictionofpropellerwithfreesurfaceandcavitationFigure13:Adams-scFLOWdynamicpredictionofwingflapdeploymentaerodynamics(abovetop)andavibratingsupersonicplateshockstructureco-simulationinMSCNastran–scFLOWCFD(abovebottom)78|EngineeringRealityMagazinepredictions(seeFigure13).
Anotherexcitingnewaerodynamicco-simulationapplicationbetweenscFLOWandMSCNastran/Marcisnon-linearpanelflutterofasupersonicplate(Ref3),involvingahighlyunusualcoupledundulatingvibrationoftheflatplate'ssurfaceathighspeedsresultinginmovingshocksonthesurface(seeFigure13).
ItwasaccomplishedbymycolleagueFaustoGilldiVincenzoinItalywhoemployedourseamlessMSCNastran-scFLOWCFDcouplingtechnologyforanefficientandfastsolution.
TheCFDdomaindeformationpredictionwasdonewithslidingmeshcapabilitiesandthentheFEAwasperformedbyMSCNastranandMarc.
TheCFDelementsusedcouldbetets,hexas,orpolyhedralelements.
Finally,anotherareaofinterestofmineisthermo-mechanicalstresspredictionsforelectroniccomponentsonchipsandPCBs(PrintedCircuitBoards).
Thisapplicationtooisquitedifficulttodoasaco-simulationbymostcommercialvendors.
InFigure14anelectronicchipresistorhasbeensimulatedthatundergoesrepeatedheatgenerationbyitsownon-offactions(Ref.
4).
Thiswilleventuallycausethebreakageofitssolderjointsoverthelifetimeofthecomponentandultimatelyproductfailure.
Beingabletopredictitinadvanceandtolocatehighstressareasisveryimportant.
TemperaturedistributionpredictionsfromscSTREAMweremappedontothemeshofthestructuralanalysissolver(egMSCNastranorANSYSMechanical).
Thestressonthesolderconnectionwasthenpredicted.
ThisisaverypowerfulwayofpredictingfailuremechanismsandtheirlikelylocationsintheconsumerelectronicsindustryandisrelativelyeasytodoinscSTREAMasaco-simulation.
VolumeVIII-Winter2018|79Figure14:scSTREAMthermo-mechanicalstresspredictionofelectroniccomponentsolderstressesSummaryClassical'multiphysics'challengesforCAEincludefluidsandstructures(FSI,VIV),structuresandacoustics,structuresanddynamics,andfluidsanddynamics.
MultiphysicssimulationmaysoundeasyinprincipleyetmanycommercialCAEvendorshavehadpointphysicssolutionsfordecadesnowbuthavefailedtoimplementusablecoupledsolutionsforindustrialgradeengineeringapplication(eitherloose-orclosely-coupledCAE).
So,'multiphysics'isstilloneofthe'HolyGrails'ofCAEsolutionevenafter40to50yearsofpointsimulationsinallthephysicssub-disciplines.
MSCSoftwarehasgrappledwiththisco-simulationconundrumandcomeupwithmanyusablesolutionsandtoolchainsforrealworldengineeringapplications.
IwouldencourageyoutoexplorewhatweofferanduseMSCOnecreditstotrythemout.
AskyourlocalMSCaccountmanagerorsupportengineerifyouwanttoknowmore.
WeofferboththetechnologiesandtheprofessionalservicesthatcanhelpyousolveyourindustryCAEco-simulationchallenges.
References1.
"BacktotheFuture;TrendsinCommercialCFD"byJ.
Parry&K.
Hanna,NAFEMSWorldCongress,Boston,USA,2011:http://s3.
mentor.
com/public_documents/whitepaper/resources/mentorpaper_90428.
pdf2.
"NoisePredictionforElectricPowertrain"Webinar,byR.
BaudsonandY.
Fan,August2018:http://www.
mscsoftware.
com/events_assets/Webcasts/2018_Webinars/noise-prediction-for-electric-vehicle-powertrain.
html3.
"AnEfficientFluidStructuralWorkflowusingtheSeamlessCouplingTechnology"Webinar,August2018:http://www.
mscsoftware.
com/events_assets/Webcasts/2018_Webinars/an-efficient-fluid-structural-workflow-using-the-seamless-coupling-technology-within-msc-nastran-marc-and-sc-tetra.
html4.
"PredictingDurabilityofJunctionsforMountedParts"CradleCFDCaseStudy:https://www.
cradle-cfd.
com/images/applications/electronics/11ST_MountedPartsDurability_email
数脉科技(shuhost)8月促销:香港独立服务器,自营BGP、CN2+BGP、阿里云线路,新客立减400港币/月,老用户按照优惠码减免!香港服务器带宽可选10Mbps、30Mbps、50Mbps、100Mbps带宽,支持中文本Windows、Linux等系统。官方网站:https://www.shuhost.com* 更大带宽可在选购时选择同样享受优惠。* 目前仅提供HKBGP、阿里云产品,香港...
妮妮云的来历妮妮云是 789 陈总 张总 三方共同投资建立的网站 本着“良心 便宜 稳定”的初衷 为小白用户避免被坑妮妮云的市场定位妮妮云主要代理市场稳定速度的云服务器产品,避免新手购买云服务器的时候众多商家不知道如何选择,妮妮云就帮你选择好了产品,无需承担购买风险,不用担心出现被跑路 被诈骗的情况。妮妮云的售后保证妮妮云退款 通过于合作商的友好协商,云服务器提供2天内全额退款,超过2天不退款 物...
ShockHosting商家在前面文章中有介绍过几次。ShockHosting商家成立于2013年的美国主机商,目前主要提供虚拟主机、VPS主机、独立服务器和域名注册等综合IDC业务,现有美国洛杉矶、新泽西、芝加哥、达拉斯、荷兰阿姆斯特丹、英国和澳大利亚悉尼七大数据中心。这次有新增日本东京机房。而且同时有推出5折优惠促销,而且即刻使用支付宝下单的话还可获赠10美金的账户信用额度,折扣相比之前的常规...
meansys.com为你推荐
网易网盘关闭入口网易网盘怎么打不开了硬盘的工作原理硬盘的工作原理?是怎样存取数据的?硬盘的工作原理硬盘的工作原理是?(不要给我网址,我用的手机)百度关键词价格查询百度竞价关键词价格查询,帮忙查几个词儿点击一次多少钱,thanks郭泊雄郭佰雄最后一次出现是什么时候?www.299pp.com免费PP电影哪个网站可以看啊ip查询器怎么样查看自己电脑上的IP地址www.bbb551.com100bbb网站怎样上不去了www.se222se.com原来的www站到底222eee怎么了莫非不是不能222eee在收视com了,/?求解www.kaspersky.com.cn现在网上又有病毒了?
美国免费主机 虚拟主机mysql com域名抢注 老左 securitycenter googleapps mediafire下载工具 10t等于多少g info域名 云主机51web 租空间 申请个人网页 浙江独立 架设服务器 cdn加速是什么 支付宝扫码领红包 华为云服务登录 中国电信测速网站 photobucket 后门 更多